Merge branch 'expiration-date-on-memberships' into 'master'

CHANGELOG

app/assets/javascripts/dispatcher.js

app/assets/javascripts/member_expiration_date.js

app/assets/javascripts/project_members.js

app/assets/stylesheets/pages/projects.scss

app/controllers/admin/groups_controller.rb

app/controllers/groups/group_members_controller.rb

app/controllers/projects/group_links_controller.rb

app/controllers/projects/project_members_controller.rb

app/models/concerns/expirable.rb

app/models/group.rb

app/models/member.rb

app/models/members/project_member.rb

app/models/project.rb

app/models/project_group_link.rb

app/models/project_team.rb

app/services/members/authorized_destroy_service.rb

app/services/members/destroy_service.rb

app/views/groups/group_members/_new_group_member.html.haml

app/views/groups/group_members/update.js.haml